Mailgen has HTML Injection and XSS Filter Bypass in Plaintext Emails

mailgen is a Node.js package that generates responsive HTML e-mails for sending transactional mail. Mailgen versions through 2.0.31 contain an HTML injection vulnerability in plaintext emails generated with the generatePlaintext method when user generated content is supplied. The plaintext generation code attempts to strip HTML tags using a regular expression and then decodes HTML entities, but tags that include certain Unicode line separator characters are not matched and removed. These encoded tags are later decoded into valid HTML content, allowing unexpected HTML to remain in output intended to be plaintext. Projects are affected if they call Mailgen.generatePlaintext with untrusted input and then render or otherwise process the returned string in a context where HTML is interpreted. This can lead to execution of attacker supplied script in the victim’s browser. Version 2.0.32 fixes the issue.

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在Web页面生成时对输入的转义处理不恰当(跨站脚本)

mailgen 跨站脚本漏洞

mailgen是Elad Nava个人开发者的一个邮件生成库。 mailgen 2.0.31及之前版本存在跨站脚本漏洞，该漏洞源于generatePlaintext方法在处理用户生成内容时未正确过滤HTML标签，可能导致跨站脚本攻击。

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